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post binder /ˈpəʊst ˈbaɪndə/ n

中文：柱栓活页夹

中文 · 柱栓活页夹Español · carpeta de tornillosFrançais · reliure à vis
Meaning：Binder with two rods that fit into a hinge; it is used to hold and file punched sheets of paper.
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Filing supplies

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